On your plan
Each paid plan includes vCPU and RAM that all of the account’s computers share. Past that, add capacity to your account at these rates:
A whole computer’s worth of capacity, all three together:
2XL is set up on request. Add capacity in Settings → Plan & billing, or with Add capacity.
By the hour
Linux computers by the hour, from your credit. The running price covers vCPU, RAM and disk. A stopped computer pays only for its disk.
Time is billed a minute at a time. A computer with an end prepays its whole run when it starts, and what it does not use comes back to your credit. The New computer sheet shows the price for the size you pick before you launch.